Indenting apparatus



April 1929. E. P. KERRUISH 1,707,400

INDENTING APPARATUS Filed Dec. 27, 1926 0 Edward RKerrulsh BY gm? 1 TTOR.

Patented Apr. 2, 1929.

' UNITED STATES PATENT OFFICE.

EDWARD P. KERRUISH, OF CLEVELAND HEIGHTS, OHIO, ASSIGNOR TO THE CLEVE- LAND GRAPHITE BRONZE COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

, InDENrrne APPARATUS.

Application filed December 27, 1926. Serial No. 157,049.

The present invention, relating as indicat ed, to an indenting apparatus 1s more particularly directed to an apparatus for forming.

spaced indentations in the internal surfaces of bearing memhers of that type now in general use which are formed of rolled sheet metal properly sized and formed and then cut and reformed if necessary into flat and cylindrical bearings for various. uses. The present apparatus is intended to searify one or both surfaces of the rolled sheet metal while it is still in that form and prior to the subsequent blanking and reforming of the metal sheets into the desired bearings. To the accomplishment of the foregoing and related ends, said invention, then, consists of the means herein after fully described and particularly pointed out in the claims.

The annexed drawing an lthe following d'escription set forth/in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various i'nechanical forms in which the principle of the invention may be used.

' In said annexed drawing Fig. 1 is a side elevation'of'one form of apparatus contemplated by the present inven-.

tion; Fig. 2 is a plan view of a strip which has been treated by the said apparatus; and Fig. 3 is an elevation of another form of apparatus contemplated by the present invention. L Fig. 1 discloses two cooperative rolls 1 an 2 between which a strip 3 of metal is adapted to be passed. One or both of the rolls 1 and 2 may be provided with a series of recesses which may be placed in any relation, but which are preferably equidistant. The recesses 8 are semi-sperical and are adapted to receive balls 4, the diameter of each ball being substantially equal to the diameter of the recess 8 in which said ball is received. I have shown the recesses 8 all of the same dimensions, and equidistantly spaced, but it is to be The roll 1 is adapted to receive on itsexternal surface a sheet 6, said sheet being provided with a plurality of apertures 7 adapted to register with the recesses 8. Said apertures 7 are so formed that each one is of slightly less diameter than the particular recess with which it registers when the sheet 6 is applied to the roll 1. It will be obvious that the sheet 6 comprises a retaining means for the balls 4, and yet allows said balls to project beyond the surface formed by said sheet -6.- It will be apparent froman inspection of Fig. 1 that, as the sheet 3 is passed between the rolls ;1 and 2, the projecting portions of the ball at will form correspondingly shaped and spaced recesses in said sheet 3.

A modification of the above apparatus is disclosed in Fig. 3, said modification consisting of opposed dies 10 and 11, the die 10 being movable toward and away from the die 11 to act upon strips 12 of bearing material which are inserted between the two dies. The upper die 10 is provided with a series of semispherical recesses 14 for the reception of balls 13, and it is to be understood that a flat sheet similar to the sheet 6 above described is pro.- vided to retain. the balls 13 in place in said die 10.. As in the modification disclosed in Fig. 1, the size and spacing of the recesses 14,

cesses in work, and it is further noted that the device .herein disclosed is considerably more economical in use than any other device for a similar purpose known to me, since, in the event of breakage of or darnage to any one of the balls 4 or 10, the damaged member may be replaced at a very slight cost. Where work of a similar type is done by rolls including integral projections, the breakage of or damage to one of the said projections necessitates replacement of the entire roll. I

I claim: f 1. An indenting member provided with a plurality of semi-spherical recesses in its surface, balls seated in said recesses, and a retaining sheet secured to said surface and provided With apertures registering with. said recesses.

2.'An indentin member provided with a plurality of semi-s hericalrecesscs in its surface, balls seated in said recesses, and a retaining sheet secured to said surface and JIO- vided with apertures registering with sai recesses, the diameter of each of said apertures said surface of said cylinder and provided 1 being less than the diameter of the recess with with apertures adapted to register with said which it registers. recesses, the diameter of each of said aper- 3. Indenting apparatus comprising a cylintures being less than the diameter of the re 5 der provided on its peripheral surface With a cess and ball with which it registers. I

plurality of semi-spherical recesses, a ball in Signed by me, this 17th day of December, 15 each recess, the diameter of each ball being 1926.

equal to the diameter of the recess in which it I v is seated, and a retaining sheet secured over EDWARD P. KERRUISH. 

